function classUtils(){
	var me = this;
	
	me.aleatorio = function(inferior,superior){
		var numPossibilidades = superior - inferior;
	    var aleat = Math.random() * numPossibilidades;
	    aleat = Math.floor(aleat);
	    aleat = parseInt(inferior) + aleat;
	    return aleat;
	};
	
	//pega a altura e largura da tela
	me.verificaTamnahoTela = function(){
		var height = 0;
	    if(window.screen > 0){
	    	height = window.screen.availHeight;
	    };   
	    if(window.innerHeight > 0){
	    	height =   window.innerHeight;
	    };
	    if(document.body > 0){
	    	height = document.body.clientHeight;
	    };	   
		var width = 0;
	    if(window.screen > 0){
	    	width = window.screen.availWidth;
	    };
	    if(window.innerWidth > 0){
	    	width = window.innerWidth;
		};
	    if(document.body > 0){
	    	width = document.body.clientWidth;
	    };
	    
	    if (height > width) {
		    configuracao.width = height;
		    configuracao.height = width;
	    } else {
		    configuracao.width = width;
		    configuracao.height = height;    	        	
	    };
	};
};